HOW TO USE RUBYCON POWER SUPPLY UNIT GSW75 The following information concerns the general safety precautions that must be observed during all phases of installation, operation, adjustment and service of this power supply. This is a Component Power Supply for installation in host equipment. This is a Class 1 safety component. WARNING High voltages are present in this power supply. Do not touch components within this power supply, no user serviceable parts, do not disassemble this unit. Never adjust or service this power supply alone! Always have another person available to render first aid or resuscitation if necessary. CAUTION Read the catalogue, the specifications and this manual before installation and use. This power supply is designed and manufactured as a Component Power Supply for installation in a host equipment. Therefore, apply to the equipment a " WARNING" label and describe the items listed within " CAUTION" data in the host equipment instruction / operating manual. TO PREVENT DAMAGE TO THE POWER SUPPLY AND THE POSSIBILITY OF AN ELECTRIC SHOCK HAZARD · Do not exceed the rated power or rated output current. · Do not exceed the maximum operating temperature. · Do not use in high humidity or damp conditions. · Do not use at excessively high temperatures, or dusty conditions. · Never use in the presence of corrosive or flammable gases or fumes as the power supply will constitute a definite safety hazard. · The input supply voltage allowable range is 85 to 264 VAC, Do not use above or below these voltages. · To minimize electric shock hazard, the frame of this power supply must be connected to a safety ground. · If the input fuse is open, the power supply may have been damaged. Do not replace the fuse, Please return the power supply unit to your local RUBYCON sales office or distributor. · Do not modify this power supply. · During design of the host equipment consider protection from surge voltages such as lightning. HOW TO USE SWITCHING POWER SUPPLY (An extract from EIAJ articles) Switching power supply has excellent performance characteristics, featuring compact-size, lightweight and high efficiency. Please use the switching power supply unit correctly in order to improve the reliability of your electric equipment. Switching power supplies being used worldwide have been and are produced in various kinds and types for both AC and D.C. operation. Before using the switching power supply, please confirm local voltage, AC or DC, the allowable voltage range, the input-selection method, etc. RUBYCON resonant power supply permits 85 to 264VAC as the input voltage range and 47 to 63Hz as frequency. Input power other than the specified power may damage the power supply. The power supply sometimes may not work normally due to the distortion of input voltage even though the input voltage is within the specified range. INPUT CURRENT ---------------------------------------------------------------------------------------------Switching power supplies with few exceptions directly rectifies AC input. In this case, the most rectifying method is the capacitorinput method, and reactive current runs through a smoothing capacitor. Therefore, input current is decided by output power, input voltage, power factor, and efficiency. In the switching power supply, power factor is generally about 0.4 to 0.6. However, Rubycon resonant power supply has PFC (Power Factor Collection circuit) so the power factor is about 1, consequently the large input current is reduced in comparison to Rubycon Resonant Power Supply - with PFC, The Other Switching Power Supply - without PFC Input Rectifying Smoothing Circuit many other switching power supplies. INRUSH CURRENT -------------------------------------------------------------------------------------------In the switching power supply, when turned on it, peak current flows through to charge the input smoothing capacitor. This current is called "inrush current". Though the value of inrush current varies depending on the timing of input and the inrush current prevention circuit, etc., it reaches up the equivalent of 10 - 20 times as much as the input current in normal state. When some sets of the switching power supplies are used together, inrush current is increased. It suggests careful consideration must be given to select line, fuse, switch, etc. INPUT FUSE ----------------------------------------------------------------------------------------------------If the input fuse is open, the switching power supply may have been damaged. Do not replace the fuse, Please return the power supply unit to your local RUBYCON sales office or distributor. Even the high efficiency switching power supply can not function well if the mounting, wiring and connection are not done in the method direct. Please use it observing directions as follows: MOUNTING METHOD -----------------------------------------------------------------------------------------------------------------------(1) Radiation (2) Output Derating a. To take account of ventilation. Output power depends on the operating temperature. b. To observe the mounting direction. The following derating curve is for reference. c. To take account of heat conduction. d. To keep required space (ℓ≥60mm) between power supply units when using some power supply units close together. e. It is desirable to have the forced air-cooling. (3) Mounting Screw When mounting the power supply to the set, be sure to check the length of a screw (≤50mm) and the clamping torque (16 kgf•cm [1.56 N•m]) taking into consideration insulation and clamping strength. MOUNTING METHOD -----------------------------------------------------------------------------------------------------------------------(1) Wiring to Input and Output a. Please ensure input wiring and the output wiring (2) Grounding Connection For safety and noise prevention, connection between are separated to prevent input line external surge voltage power supply frame/chassis ground the earth terminal of from interfering with the output and to avoid an increase the set should be "HEAVY & SHORT" and with positive in line conducted noise. connection. b. It is suggested that the output wiring is "HEAVY & SHORT" in consideration of the output current. (3) Wiring for Remote ON/OFF Control and Remote Sensing (4) Correct Terminal Connection When wiring to the switching power supply, it is suggested to select the terminal screw of suitable diameter, compressed terminal, lead and tools. In general, the switching power supply is the DC regulated power supply of special structure for installing in host equipment. Please use it only for this purpose. INPUT VOLTAGE RANGE ------------------------------The permitted input voltage range of Rubycon power supply is 85 to 264VAC at 47 to 63Hz frequency. To avoid power supply damage, do not use on supplies outside these ranges. Please do not exceed input voltage of 264VAC as this will damage the power supply and host equipment. Please do not use on input voltage below 85VAC as this may damage the power supply and may affect the operation of the host equipment. LEAKAGE CURRENT --------------------------------------The internal noise filter of the switching power supply keeps leakage current within the range required by the safety standards of each country. When using multiple units, The current is increased. Therefore, please take great care to prevent electric shock hazard by means of grounding, etc. WIRING MATERIAL -----------------------------------------To prevent overheating and burning of the leads at abnormal load, use appropriately sized leads good for the output current capacity of the switching power supply. This is particulary important, in the case of distributing of current to multiple loads, special caution is required. When using a thin wire as the branch line, the overcurrent protection (OCP) of the power supply may not work sometimes even in short-circuit. Accordingly, it is necessary to take measures against such a trouble by inserting a fuse into the wiring. Also bear in mind the rated voltage of the electric wire is to be used. REQUEST: For the built-in type switching power supply, the safety standards of each country are set up according to the end use product. Before using the power supply, please confirm the safety standards referring to the data of Rubycon. Rubycon switching power supplies are designed to meet EMI requirements.However, sometimes it may not function correctly depending on the wiring to the AC power source and the load, grounding, etc. When using the switching power supply, refer to following. SEPARATION OF WIRING "HEAVY & SHORT" If the input wiring is close to the output wiring, line- The input wiring and the output wiring in the equipment conducted noise is increased, and generally the radiant shall be connected "HEAVY & SHORT" with parallel or noise (noise electric-field strength) from the equipment also stranded wires. A looped wire causes the deterioration of increased. In the same way, if the input wiring is close to noise performance. the internal wiring (especially, the digital circuit) of the GROUNDING CONNECTION equipment, it may cause a line-conducted noise and Connection between power supply frame/chassis ground malfunction of the equipment by the external noise. the earth terminal of the equipment is to be "HEAVY & Separate the input wiring from the output wiring with SHORT" and sure. positive connection. AMBIENT TEMPERATURE AND LIFE The relationship between the ambient temperature and the The Switching power supply is designed to come in life of the switching power supply is shown above. When compact size, employing high efficiency switching, superior using the switching power supply at the higher ambient components and the advanced mounting technology. Life of temperature, it is suggested the electrolytic capacitor is each component is largely influenced by ambient replaced or overhauled, the power supply, if necessary for temperature, especially the electrolytic capacitor used as longer life of the switching power supply. the parts of the smoothing filter is very sensitive to the OVERHAUL ambient temperature because chemical reaction easily With advanced technology of electronics, requests for occurs inside the capacitor. longer life of switching power supply are increasing. For a Generally, electrolytic capacitors operate along with longer life and improved operation, it is suggested "Arrhenius rule" and the dominates the life of switching switching power supply overhauled in an appropriate power supply. period of time. Anticipated time of overhaul depends on the (NOTE)"Arrhenius rule" : Rise in the ambient temperature by 10°C makes ambient temperature and continuous operation. The the capacitor life 1/2 shorter,and fall by 10°C makes 2 times longer. following is just for your reference, For details of overhaul and power supply life, please contact Rubycon sales.